US2998418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid monoazo dyestuffs
Assignee: Sandoz AG
•
Filing: 1959-08-27
•
Granted: 1961-08-29
•
Expires: 1979-08-27
Abstract
No abstract record available.
Inventors
- 👤 Frisch Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:51
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/24; C09B29/28; C09B29/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
AN ACID MONOAZO DYESTUFF OF THE GENERAL FORMULA
Claim 2
Dependent Claim
8 words
AN ACID MONOAZO DYESTUFF OF THE GENERAL FORMULA
References Cited (Backward Citations)
US2892671A
Cited
US1903599A
Cited
US2205849A
Cited
US2638403A
Cited
US2750377A
Cited
US2776962A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |